摘自织梦CMS中的图片处理类

本文实例讲述了摘自织梦CMS中的图片处理类。分享给大家供大家参考。具体如下：

rush:PHP;"> __construct($targetfile,$attach); } // 析构函数 function __construct($targetfile,$attach = array()) { $this->thumbstatus = $cfg_thumb; $this->watermarktext = $cfg_watermarktext; $this->watermarkstatus = $photo_waterpos; $this->watermarkquality = $photo_marktrans; $this->watermarkminwidth = $photo_wwidth; $this->watermarkminheight = $photo_wheight; $this->watermarktype = $cfg_watermarktype; $this->watermarktrans = $photo_diaphaneity; $this->animatedgif = 0; $this->targetfile = $targetfile; $this->attachinfo = @getimagesize($targetfile); $this->attach = $attach; switch($this->attachinfo['mime']) { case 'image/jpeg': $this->imagecreatefromfunc = function_exists('imagecreatefromjpeg') ? 'imagecreatefromjpeg' : ''; $this->imagefunc = function_exists('imagejpeg') ? 'imagejpeg' : ''; break; case 'image/gif': $this->imagecreatefromfunc = function_exists('imagecreatefromgif') ? 'imagecreatefromgif' : ''; $this->imagefunc = function_exists('imagegif') ? 'imagegif' : ''; break; case 'image/png': $this->imagecreatefromfunc = function_exists('imagecreatefrompng') ? 'imagecreatefrompng' : ''; $this->imagefunc = function_exists('imagepng') ? 'imagepng' : ''; break; }//为空则匹配类型的函数不存在 $this->attach['size'] = empty($this->attach['size']) ? @filesize($targetfile) : $this->attach['size']; if($this->attachinfo['mime'] == 'image/gif') { $fp = fopen($targetfile,'rb'); $targetfilecontent = fread($fp,$this->attach['size']); fclose($fp); $this->animatedgif = strpos($targetfilecontent,'netscape2.0') === false ? 0 : 1; } } /** * 生成缩略图 * * @access public * @param int $thumbwidth 图片宽度 * @param int $thumbheight 图片高度 * @param int $preview 是否预览 * @return void */ function thumb($thumbwidth,$thumbheight,$preview = 0) { $this->thumb_gd($thumbwidth,$preview);

if($this->thumbstatus == 2 && $this->watermarkstatus)
{
$this->image($this->targetfile,$this->attach);
$this->attach['size'] = filesize($this->targetfile);
}
}
/**

• 图片水印

• @access public

• @param int $preview 是否预览

• @return void
  */
  function watermark($preview = 0)
  {
  if($this->watermarkminwidth && $this->attachinfo[0] <= $this->watermarkminwidth && $this->watermarkminheight && $this->attachinfo[1] <= $this->watermarkminheight)
  {
  return ;
  }
  $this->watermark_gd($preview);
  }
  /**

• 使用gd生成缩略图

• @access public

• @param int $thumbwidth 图片宽度

• @param int $thumbheight 图片高度

• @param int $preview 是否预览

• @return void
  /
  function thumb_gd($thumbwidth,$preview = 0)
  {
  if($this->thumbstatus && function_exists('imagecreatetruecolor') && function_exists('imagecopyresampled') && function_exists('imagejpeg'))
  {
  $imagecreatefromfunc = $this->imagecreatefromfunc;
  $imagefunc = $this->thumbstatus == 1 ? 'imagejpeg' : $this->imagefunc;
  list($imagewidth,$imageheight) = $this->attachinfo;
  if(!$this->animatedgif && ($imagewidth >= $thumbwidth || $imageheight >= $thumbheight))
  {
  $attach_photo = $imagecreatefromfunc($this->targetfile);
  $x_ratio = $thumbwidth / $imagewidth;
  $y_ratio = $thumbheight / $imageheight;
  if(($x_ratio $imageheight) < $thumbheight)
  {
  $thumb['height'] = ceil($x_ratio $imageheight);
  $thumb['width'] = $thumbwidth;
  }
  else
  {
  $thumb['width'] = ceil($y_ratio $imagewidth);
  $thumb['height'] = $thumbheight;
  }
  $targetfile = !$preview ? ($this->thumbstatus == 1 ? $this->targetfile.'.thumb.jpg' : $this->targetfile) : './watermark_tmp.jpg';
  $thumb_photo = imagecreatetruecolor($thumb['width'],$thumb['height']);
  imagecopyresampled($thumb_photo,$attach_photo,$thumb['width'],$thumb['height'],$imagewidth,$imageheight);
  if($this->attachinfo['mime'] == 'image/jpeg')
  {
  $imagefunc($thumb_photo,$targetfile,100);
  }
  else
  {
  $imagefunc($thumb_photo,$targetfile);
  }
  $this->attach['thumb'] = $this->thumbstatus == 1 ? 1 : 0;
  }
  }
  }
  /**

• 使用gd进行水印

• @access public

• @param int $preview 是否预览

• @return void
  /
  function watermark_gd($preview = 0)
  {
  if($this->watermarkstatus && function_exists('imagecopy') && function_exists('imagealphablending') && function_exists('imagecopymerge'))
  {
  $imagecreatefunc = $this->imagecreatefromfunc;
  $imagefunc = $this->imagefunc;
  list($imagewidth,$imageheight) = $this->attachinfo;
  if($this->watermarktype < 2)
  {
  $watermark_file = $this->watermarktype == 1 ? DEDEDATA.'/mark/mark.png' : DEDEDATA.'/mark/mark.gif';
  $watermarkinfo = @getimagesize($watermarkfile);
  $watermarklogo = $this->watermarktype == 1 ? @imagecreatefrompng($watermark_file) : @imagecreatefromgif($watermarkfile);
  if(!$watermarklogo)
  {
  return ;
  }
  list($logowidth,$logoheight) = $watermarkinfo;
  }
  else
  {
  $Box = @imagettfbBox($this->watermarktext['size'],$this->watermarktext['angle'],$this->watermarktext['fontpath'],$this->watermarktext['text']);
  $logowidth = max($Box[2],$Box[4]) - min($Box[0],$Box[6]);
  $logoheight = max($Box[1],$Box[3]) - min($Box[5],$Box[7]);
  $ax = min($Box[0],$Box[6]) -1;
  $ay = min($Box[5],$Box[7]) * -1;
  }
  $wmwidth = $imagewidth - $logowidth;
  $wmheight = $imageheight - $logoheight;
  if(($this->watermarktype < 2 && is_readable($watermark_file) || $this->watermarktype == 2) && $wmwidth > 10 && $wmheight > 10 && !$this->animatedgif)
  {
  switch($this->watermarkstatus)
  {
  case 1:

  $x = +5;
  $y = +5;
  break;
  case 2:
  $x = ($imagewidth - $logowidth) / 2;
  $y = +5;
  break;
  case 3:
  $x = $imagewidth - $logowidth - 5;
  $y = +5;
  break;
  case 4:
  $x = +5;
  $y = ($imageheight - $logoheight) / 2;
  break;
  case 5:
  $x = ($imagewidth - $logowidth) / 2;
  $y = ($imageheight - $logoheight) / 2;
  break;
  case 6:
  $x = $imagewidth - $logowidth - 5;
  $y = ($imageheight - $logoheight) / 2;
  break;
  case 7:
  $x = +5;
  $y = $imageheight - $logoheight - 5;
  break;
  case 8:
  $x = ($imagewidth - $logowidth) / 2;
  $y = $imageheight - $logoheight - 5;
  break;
  case 9:
  $x = $imagewidth - $logowidth - 5;
  $y = $imageheight - $logoheight -5;
  break;
  }
  $dst_photo = @imagecreatetruecolor($imagewidth,$imageheight);
  $target_photo = $imagecreatefunc($this->targetfile);
  imagecopy($dst_photo,$target_photo,$imageheight);
  if($this->watermarktype == 1)
  {
  imagecopy($dstphoto,$watermarklogo,$x,$y,$logowidth,$logoheight);
  }
  elseif($this->watermarktype == 2)
  {
  if(($this->watermarktext['shadowx'] || $this->watermarktext['shadowy']) && $this->watermarktext['shadowcolor'])
  {
  $shadowcolorrgb = explode(',',$this->watermarktext['shadowcolor']);
  $shadowcolor = imagecolorallocate($dst_photo,$shadowcolorrgb[0],$shadowcolorrgb[1],$shadowcolorrgb[2]);
  imagettftext($dst_photo,$this->watermarktext['size'],$x + $ax + $this->watermarktext['shadowx'],$y + $ay + $this->watermarktext['shadowy'],$shadowcolor,$this->watermarktext['text']);
  }
  $colorrgb = explode(',$this->watermarktext['color']);
  $color = imagecolorallocate($dst_photo,$colorrgb[0],$colorrgb[1],$colorrgb[2]);
  imagettftext($dstphoto,$x + $ax,$y + $ay,$color,$this->watermarktext['text']);
  }
  else
  {
  imagealphablending($watermarklogo,true);
  imagecopymerge($dst_photo,$logoheight,$this->watermarktrans);
  }
  $targetfile = !$preview ? $this->targetfile : './watermark_tmp.jpg';
  if($this->attachinfo['mime'] == 'image/jpeg')
  {
  $imagefunc($dst_photo,$this->watermarkquality);
  }
  else
  {
  $imagefunc($dst_photo,$targetfile);
  }
  $this->attach['size'] = filesize($this->targetfile);
  }
  }
  }
  }//End Class

希望本文所述对大家的PHP程序设计有所帮助。